<template>

  <el-container class="home-container">
    <!-- 页面头 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 页面左边区域 -->
      <el-aside :width="iscollapse ? '64px':'200px'">
        <div @click="togglecollapse" class="toggle-button">|||</div>
        <el-menu
          background-color="#333744" 
          text-color="#fff" 
          active-text-color="#409eff" 
          :collapse="iscollapse" 
          :collapse-transition="false" 
          :unique-opened="true" router 
          :default-active="isactivePath">

          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id" >
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconobj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                <template slot="title">
                    <!-- 图标 -->
                    <i class="el-icon-menu"></i>
                    <!-- 文本 -->
                    <span>{{subItem.authName}}</span>
                </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>

      <!-- 页面右边区域 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
    data() {
        return {
            //左侧菜单数据
            menulist:[],
            iconobj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao'
            },
            iscollapse:false,
            isactivePath:''
        }
    },
    created(){
        this.getMenuList();
        this.isactivePath=window.sessionStorage.getItem('activePath');
    },

    methods: {
        logout() {
            window.sessionStorage.clear();
            this.$router.push("/login");
        },
        async getMenuList(){
           const{ data:res } = await this.$http.get('menus')
           if(res.meta.status!=200) return this.$message.error(res.meta.msg)
           this.menulist=res.data;
        },
        //切换菜单的折叠与展开
        togglecollapse(){
                this.iscollapse=!this.iscollapse
        },
        //保存链接的激活状态
        saveNavState(activePath){
          window.sessionStorage.setItem('activePath',activePath);
          this.isactivePath=activePath;
        }
    },
};
</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-menu{
    border-right:none;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 10px;
  align-items: center;
  color: #fff;
  font-size: 20px;

  div {
    display: flex;
    align-items: center;
    span {
      padding-left: 20px;
    }
  }
}
.el-aside {
  background-color: #333744;
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}

.toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color:#fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>